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NBA player's immature move

New York Knicks guard J.R. Smith is a magnet for attention — most of it unwanted, according to Yahoo Sports.

When he's not getting into Twitter beefs with Detroit Pistons guard Brandon Jennings, he's driving around the Big Apple in a $450,000 armored truck.

Photo via Yahoo Sports

Sunday night, Smith added a new chapter in his strange NBA existence. With the Knicks up 48-33 on the Dallas Mavericks in the second quarter of a game they would eventually win 92-80, the 2013 Sixth Man of the Year entered the game and found himself on the blocks next to Shawn Marion during a free throw attempt by Dirk Nowitzki. Smith then pulled off one of the more childish maneuvers seen this side of Jason Kidd: he untied Marion's shoe, Yahoo Sports reports.